My grandfather was Henry Willi, born in 1884 to Kaspar (Casper) Willi and Maria (Mary) Schneider Willi. Kaspar was born in Siglistorf in 1851 and emigrated to the USA in 1883 or 1884. Henry was the first family member born in the USA in Watertown, Wisconsin. They then moved to Chippewa Falls, Wisconsin, where I grew up. He died in 1968 in Hudson, Wisconsin, where I now live.
Sophie Ludwikoski was Henry's younger sister.
I do not have information further back than Casper's parents, so I, too, would be interested in any information we could share.